ABC26IN0187 · Main Group Elements
Subject: Inorganic Chemistry · Chapter: Main Group Elements · Topic: Main Group Elements – General · Exam: CSIR-NET 2013 · Marks: 2 · Difficulty: Medium
Two tautomeric forms of phosphorus acid are 
and 
and (a)-
(b)
and 
and (c)
and 
and Answer
Answer (as printed): A
Explanation
$\mathrm{H_3PO_3}$ is dibasic and reducing in nature. Thus, it should contain two OH groups in the structure.